OMAPL138如何在Linux下使用EDMA3驱动

yyj

) n5 h* p' x" O9 L& n

1. [code]EDMA sample test application
   # z0 S6 ?3 w; c  C5 U
2. /*
   1 j/ r, i2 _' U) ^
3. * edma_test.c
   5 `- j  C0 o+ O  b$ M: I
4. *
   ( ^9 u( N7 k7 E% v9 d" A: r/ y$ r
5. * brief  EDMA3 Test Application
   
6. *
   7 B4 b0 |$ _' ?1 y' G1 A: G0 O
7. *   This file contains EDMA3 Test code.
   8 Q# s7 M, S0 ?. E  s4 h
8. *
   3 L+ Y# ]  a: b
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    $ ?/ g4 @: o, p9 s# z, W' X/ l
14. *
    6 C# ?. }; X+ v" G. E
15. * This program is free software; you can redistribute it and/or
    # w6 H" d) |+ {1 w9 K
16. * modify it under the terms of the GNU General Public License as
    % ^! @! t8 d" h9 q, o: _( [
17. * published by the Free Software Foundation version 2.
    - [- \" ^/ H7 n
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ; }( ~% f5 _" J; L( t% A+ k: V  @
20. * kind, whether express or implied; without even the implied warranty
      l- j3 `# @/ ]; B! G& G9 [9 U
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    : e4 Z: D# `- S3 I! D
22. * GNU General Public License for more details.
    
23. */
    ; {0 s. m2 z( X8 I
24. 
    : [/ ?+ I' p0 ?( i6 t
25. #include <linux/module.h>
    ; s' k# O# ^* Y9 Y0 ]- t$ a
26. #include <linux/init.h>
    # d7 f4 g! h" b- V. y
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    " C7 d( n" U2 k
29. #include <linux/interrupt.h>
    4 ?1 [/ r' f7 p/ K. c
30. #include <asm/io.h>
    5 U' k, f* Q, h% k" b: F9 h) J( B- \0 i9 O
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    ' p) v- G" F5 g" j
35. 
    5 m6 d7 V& F) W- Y1 ]  u8 M! F
36. #include <mach/memory.h>
    " }! T! Z- F; V& g9 }
37. #include <mach/hardware.h>
    9 d% r$ q( f) H2 C: j9 @, B0 f
38. #include <mach/irqs.h>
    4 _' ~. G3 U% I% a. |
39. #include <asm/hardware/edma.h>
    ) ^) z4 a% {. {. P
40. 
    : P3 r; N1 H" Z
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    ) R8 ]6 M% o7 O+ U6 J& ]
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    5 G. t$ Q8 l" ?0 A" Z
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    / N! C+ Q6 S3 u
49. #define DMA_PRINTK( x... )
    ! s* [  o4 S) G* S4 H
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    3 X6 H8 g2 Q2 S* I9 v* G
52. #endif
    3 K/ s$ f: ?9 v( E4 ?) G! M
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    $ W- `; C0 B/ N4 G# r' B' X/ l/ k
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    5 c. n- ]/ z, u6 T$ J- E3 n
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    # ~4 e2 X6 Y/ }* D& u* R
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    4 b/ \+ ~$ x6 j2 Q; J. k
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    5 t( p1 F3 H# a9 P& Q
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    4 ?# g  ]- f2 j3 M& a
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    + E$ w9 m' n# f4 w  N) A' d
72. 
    * K/ R0 j$ l/ Z( }6 E$ e; R
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    ' h# _% V9 h# d) y) ^7 _) g
75. char *dmabufdest1 = NULL;
    + f! q* E2 N6 o  u# H
76. char *dmabufdest2 = NULL;
    0 Y8 J- P% u) i" n( W) ]' S) R
77. 
    : Y$ ^2 B: a" G- U5 N
78. static int acnt = 512;
    1 k) [: u( `4 e* m9 g
79. static int bcnt = 8;
    2 T9 K5 g0 e; r- E8 q7 V8 a
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    2 B. {9 f$ u+ P" f9 L8 ^, f
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

      这是在TI上找到的一个针对Davanci处理器简单的EDMA3驱动程序测试例程的一部分，我在编译的过程中是用
4 c8 e9 X( e) d% carm-none-linux-gnueabi-gcc  -I /home/tl/omapl138/linux-3.3/arch/arm/include -I /home/tl/omapl138/linux-3.3/include  EDMA3test.cpp -o EDMA3这个命令来链接库文件进行编译，但是报的错误特别多，我又试着一个函数一个函数往进加，仍然是很多错误。
* O% l0 `, k$ r/ C+ j1 f  X     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
2 o$ S8 l: ]( u5 O6 P
: l! {6 d. [$ h# r